Didn't notice a seashell yesterday on a ride, and while the Marathon tyre didn't puncture there's a little cm2-ish flap of rubber at the edge of the tread I'd like to glue down so it doesn't rip off or capture a piece of glass or something - ideally I'd like to get some black Sugru but I've no idea if anywhere in Edinburgh sells it, anyone know of a place? Or failing that, where can I grab a cheap little tube of another flexible rubber adhesive?
I could order off Amazon but since I refuse to contract the Prime virus it'd take a week or more to show up.